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YDS Architects

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United States
Monrovia, CA
YDS Architects

Architecture Design Firm. We design and permit Accessory Dwelling Unit (ADU), TOC Condos, and SB9. Contact us today for a free consultation.

YDS Architects is a leading architecture firm in Monrovia, California, specializing in ADU & multifamily residential architecture design. We guide clients through the entire process, from architectural design and building plans to obtaining building permits in Southern California. Whether you're looking for ADU, apartment building, and residential home design in Southern California our team of loc

ally experienced architects led by architect Yifu Pan, can help. We serve clients throughout San Gabriel valley area to Greater Los Angeles and Southern California offering architectural design services and expertise in permit expiditing for both residential and commercial architecture. Our services include:

- Architectural design from Monrovia, San Gabriel valley area, Greater Los Angeles to Southern California
- Apartment building design and permitting Monrovia, San Gabriel valley area, Greater Los Angeles to Southern California
- Building plans Monrovia, San Gabriel valley area, Greater Los Angeles to Southern California
- Design and permits Monrovia, San Gabriel valley area, Greater Los Angeles to Southern California
- Home design Monrovia, San Gabriel valley area, Greater Los Angeles to Southern California
- ADU design and permitting Monrovia, San Gabriel valley area, Greater Los Angeles to Southern California
- Architectural drafting Monrovia, San Gabriel valley area, Greater Los Angeles to Southern California

Have questions about modern home design in Monrovia or need an architect for restaurant design in Monrovia? We're here to answer your questions:

How much does an architect cost in SoCal? What permits do I need to remodel in Socal? YDS Architects, Your trusted local partner for architectural design and building permits in Monrovia and SoCal.

05/27/2026

What does financial peace of mind look like in LA?

It looks like a gorgeous 3,774 sq. ft. footprint in Granada Hills that works for you. We all know the local market can be intimidating, which is why properties with built-in versatility are absolute gold.

Having a beautifully integrated, attached ADU means you have options from day one. Use it to offset your mortgage with rental income, or use it as a private guest suite for loved ones. Combined with the ease of an attached 2-car garage, this home removes the daily friction of LA living. It’s not just a beautiful structure; it’s a smart, sustainable lifestyle upgrade.

Thinking about making a move that actually checks out on paper and feels like home? Let's talk.

Architect: YDS Architects.

05/16/2026

The fire was devastating, but in its aftermath, certain parcels in Altadena now have an opportunity to reimagine housing through SB1123 and a more thoughtful, community-oriented density.

Our design proposal explores how new multifamily development can still preserve the character of Altadena. We retained the iconic front-facing gable roof as a tribute to the neighborhood’s architectural language, while transforming the upper roof area into accessible roof gardens and shared outdoor space.

We’re honored that this project received the “Most Collaborative Design” award in the Multifamily Category at the AIA Altadena Rebuild Competition.

More to come in the upcoming days.

04/25/2026

The Ultimate Rooftop Retreat

Why settle for a backyard when you can have a private oasis in the sky?

The Mariposa Complex features staggered rooftop terraces that offer every resident a slice of the outdoors with panoramic views. Whether it’s a morning coffee under the umbrella or an evening hosting friends above the treeline, these spaces are designed for the ultimate SoCal lifestyle. This is high-density living without the compromise. ✨

03/21/2026

Big milestone in Monrovia 🎉
Our project has officially received Conditional Use Permit approval from the City of Monrovia. From site planning to interior layout, this design brings new life to a local destination—home to Rigo’s Fiesta Mexican Food.

Excited to keep moving this one forward.

03/13/2026

The Randolph Complex represents our commitment to contemporary forms that respect their surroundings. Located in the heart of Los Angeles, this project was an exercise in scale and serenity.

By balancing a substantial 7,500 sq ft program across two stories, we’ve created a retreat that prioritizes clean lines and framed views. Whether it’s the sunlit terraces or the way the structure layers into the landscape, every detail was designed to feel intentional.

Architecture is most successful when it solves for density without losing the human element. A home should be a sanctuary—whether it’s designed for one family or three. 🌿

Project Details:
📍 Location: Los Angeles, CA
🏠 Type: Multi-family Residential (Two Primary Units + ADU)
📐 Footprint: 150' x 50'

03/11/2026

At the Cuckoo Residence, we imagined a different way to live together in the city. Instead of shared walls and closed spaces, the architecture opens up to light, air, and nature.

Courtyards and terraces replace conventional layouts, creating a 10,387 SF home where privacy and community exist in balance.

It’s our vision of multi-family living—where every home feels like a private retreat, yet still part of something larger.

02/14/2026

This three-story single-family home brings 1,911 SF of thoughtful design into a compact footprint, with an attached ADU and one-car garage. Clean lines, warm materials, and layered outdoor spaces create a flexible home that feels modern, livable, and distinctly Southern California.

02/12/2026

Foothill Residence is a smart take on LA density, combining a two-story single-family home, an attached ADU, and a one-car garage within a streamlined 2,273 SF footprint. Sharp rooflines and a calm courtyard create a balance of privacy and connection, supporting flexible, modern living without trying too hard.

02/10/2026

The Beaver Project is a 2,125 SF live-work single-family residence shaped by efficiency, clarity, and restraint. Its elongated footprint and simple gabled form create a quiet architectural presence, while dark wood cladding and carefully placed openings connect the home to its surrounding landscape. Designed to support both living and working under one roof, the project reflects a contemporary approach to flexibility, craft, and everyday use.

Explore the project and follow along for more work from our studio.

02/03/2026

Most see a single lot. We saw a micro-neighborhood waiting to happen.

The challenge wasn't just fitting four homes into one space—it was ensuring that when you walk in the door, the rest of the world melts away. The Torrance Residence is proof that you can have neighbors close by and still feel like you’re in your own private world.

It’s about shared value, not just shared walls.

Architect License #: C-41543

12/13/2025

First look at the new yds arch website. Same team, brand new vibe.

Coming soon.

Address

177 N Primrose Avenue
Monrovia, CA
91016

Opening Hours

Monday	8am - 6pm
Tuesday	8am - 6pm
Wednesday	8am - 6pm
Thursday	8am - 6pm
Friday	8am - 6pm
Saturday	8am - 6pm

Telephone

+16266600206

Website

https://ydsarch.com/

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